Three-dimensional visualization and characterization of morphology and internal microstructural features of primary silicon crystals in a cast Al–Si base alloy

Singh, Harpreet; Gokhale, A.M.; Mao, Y.; Tewari, Ashish; Sachdev, Anil K.

doi:10.1016/j.jcrysgro.2009.08.001

Cited by 7 publications

(3 citation statements)

References 23 publications

(50 reference statements)

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“…They suggested that if the latent heat of solidification cannot be released in time, it will lead to the remelting of the primary eutectic phase. This phenomenon has also been found in the 3D internal microstructural features of primary silicon crystals in a cast Al-Si base alloy [28]. In the present work, it can be deduced that the holes in the lamellar α -Ni phase may also mean the occurrence of remelting during solidification.…”

Section: Resultssupporting

confidence: 79%

Three-dimensional reconstruction of anomalous eutectic in laser remelted Ni-30 wt.% Sn alloy

Cao

Lin

Wang

et al. 2015

Science and Technology of Advanced Materials

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Laser remelting has been performed on Ni-30 wt.% Sn hypoeutectic alloy. An anomalous eutectic formed at the bottom of the molten pool when the sample was remelted thoroughly. 3D morphologies of the α-Ni and Ni3Sn phases in the anomalous eutectic region were obtained and investigated using serial sectioning reconstruction technology. It is found that the Ni3Sn phase has a continuous interconnected network structure and the α-Ni phase is distributed as separate particles in the anomalous eutectic, which is consistent with the electron backscatter diffraction pattern examinations. The α-Ni particles in the anomalous eutectic are supersaturated with Sn element as compared with the equilibrium phase diagram. Meanwhile, small wavy lamella eutectics coexist with anomalous eutectics. The Trivedi–Magnin–Kurz model was used to estimate undercooling with lamellar spacing. The results suggest that the critical undercooling found in undercooling solidification is not a sufficient condition for anomalous eutectic formation. Besides, α-Ni particles in the anomalous eutectic do not exhibit a completely random misorientation and some neighboring α-Ni particles have the same orientation. It is shown that both the coupled and decoupled growth of the eutectic two phases can generate the α-Ni + Ni3Sn anomalous eutectic structure.

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Section: Resultssupporting

confidence: 79%

Three-dimensional reconstruction of anomalous eutectic in laser remelted Ni-30 wt.% Sn alloy

Cao

Lin

Wang

et al. 2015

Science and Technology of Advanced Materials

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“…At elevated temperature, the thermally stable intermetallics like Ni-containing phases could impose drag on boundaries and help to increase the elevated-temperature strength. The distribution and morphology of intermetallic phases have great influence on the elevated-temperature strength of Al-Si piston alloys [6,9].…”

Section: Discussionmentioning

confidence: 99%

“…The mechanical and physical properties of Al-Si piston alloys strongly depend upon the types, morphologies and distributions of the second phases. The microstructures are a function of alloy composition and other processing parameters [4,8,9].…”

Section: Introductionmentioning

confidence: 99%

Quantitative comparison of three Ni-containing phases to the elevated-temperature properties of Al–Si piston alloys

Yang

et al. 2010

Materials Science and Engineering: A

181

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Morphologies of Primary Silicon in Hypereutectic Al-Si Alloys: Phase-Field Simulation Supported by Key Experiments

Wang

Wei

Zhang

et al. 2016

Metall Mater Trans A

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Three-dimensional visualization and characterization of morphology and internal microstructural features of primary silicon crystals in a cast Al–Si base alloy

Cited by 7 publications

References 23 publications

Three-dimensional reconstruction of anomalous eutectic in laser remelted Ni-30 wt.% Sn alloy

Three-dimensional reconstruction of anomalous eutectic in laser remelted Ni-30 wt.% Sn alloy

Quantitative comparison of three Ni-containing phases to the elevated-temperature properties of Al–Si piston alloys

Morphologies of Primary Silicon in Hypereutectic Al-Si Alloys: Phase-Field Simulation Supported by Key Experiments

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